Machine for making bleaching-powder.



I. ISHIKAWA.

MACHINE FOR MAKING BLEACHING POWDER.

APPLICATION FILED IAN. 8' I916.

Patented Oct. 10,1916.

4 SHEETS-SHEET I.

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I. ISHIKAWA. MACHINE FOR MAKING BLEACHING POWDER.

APPLICATION FILED JAN. 8, 1916- Patented Oct. 10, 1916.

4 SHEETS-SHEET 2 I. ISHIKAWA. MACHINE FOR MAKING BLEACHING POWDER.

APPLICATION FILED ]AN.8,19I6. 1,200,499.

4 SHEETS-SHEET 3.

Q avweufoz fig 7 as Patented Oct. 10, 1916.

I. ISHIKAWA. MACHINE FOR MAKING BLEACHING POWDER.

APPLICATION FILED IAN. 8, I916.

Patented Oct. 10,1916.

4 SHEETS-SHEET 4.

UNITED STATES PATENT OFFICE.

ICHIRO ISHIKAWA, OF TOKYO. JAPAN.

MACHINE FOR MAKING BLEACHING-POWDER.

1,200,499. srecifleation of Letters Patent Patented Oct. 10, 1916. Application filed January 8, 1916. Serial No. 70,941.

To all whom it may concern: sectional view of the same, taken on the Be it known that I, IcHmo ISHIKAWA, a line 8-8, Fig. 7, and looking in the direcsubject of the Emperor of Japan, and residtion of the arrows. Fig. 9 is a sectional ing at Nishigahara, Takinogawa, Tokyo, view taken on line 99, Fig, 6, and looking Japan, have made a certain new and useful in the direction of the arrows. Fig. 10 is Invention in Machines for Making Bleacha view in section of a powder chamber. Fig. ing-Powder, of which the following is a 11 is an end view, in section, of the same. specification. Fig. 12 is a top plan "iew of a powder cham- This invention relates to machines for ber. Fig. 13 is an end view of the same. 10 making bleaching powder. The same part is designated by the same The object of the invention is to provide reference numeral wherever it occurs a machine for making bleaching powder throughout the several views. which is simple in structure and efiicient In the manufacture of bleaching powder, in operation wherein the feed of lime into the most practical and successful machine 15 the machine is controlled by the operation of that has been constructed and employed in the machine itself, and wherein the lime is the art is known as the Hasenclever maautomatically sifted at the outlet from the chine, which consists of several superimmachine. posed tubes or powder chambers, of which A further object of the invention is to preany desired number can be employed in a 20 vent the machine from failing due to the acset. Each of these tubes is provided with cumulation of the lime within the cylinders. an agitator therein consisting of a shaft A further object of the invention is to having secured thereto vanes or-other suitprovide a chain drive for the cylinder agiable agitators, the shafts being rotated by tators of less strength than the internal mova gear wheel at the end thereof outside of the 25 ing parts, thereby securing an external break tube, which gear wheel meshes with'a simiin parts in case of failure of the machine. lar gear wheel of the tubes immediately Further objects of the invention will apabove and below. The lime is charge ear more fully hereinafter. through a hopper into the topmost tube, and

The invention consists substantially in the passes from tube to tube, after traversin 30 construction, combination, location and relathe length of each tube due to the action o 5 tive arrangement of parts, all as will be the agitator. The chlorine gas is admitted more fully hereinafter set forth, as shown into the bottom tube, V and, by suction, is in the accompanying drawin and finally drawn from tube to tube, and acts upon the pointed out in the appended c aims. lime it meets to form the bleaching powder.

35 Referring to the drawings, Figure 1 is a The gas is discharged from the topmost tube view in front elevation of a machine eminto the atmosphere and the powder from bodying my invention. Fig. 2 is a view the bottom tube into any suitable receptacle. taken on the line 2, 2, Fig. 1 and looking in It is then carried away, and sifted and the the direction of the arrows. Fig. 3 is an encommercial form of bleaching powder is 40 larged view of a portion of a pair of bleachthus secured. As hereinbefore' stated, this ing powder chambers embodying my invenis the usual form and operation of the Hation, said view being in section taken on senclever apparatus which has proven to be line 3-3, Fig. 4, and looking in the direccommercial y successful. It has been found, tion of the arrows. Fig. 4 is a view in sechowever, that many disadvantages have been 45 tion taken on the line Fig. 3, lookencountered in the practical operation of the 10 in in the direction of the arrows. Fig. 5 machine. In the first place, where concenis a broken enlarged view in side elevation trated chlorin gas was employed, the action. showing a modified'form of powder chamof the gas on the lime causes the same to beber, embodying my invention. Fig. 6 is an come greatly heated, and consequently the .50 enlarged broken view in front elevation of product is decomposed, and comes out mostly the owder feeding portion of the machine as calcium chlorid. Where weaker gas is art ly in section. Flg. 7 is a view in elevaemployed the product is in most cases too tion, partly broken, and partly sectional, weak for commercial use. It was found showing the gas exhaust employed in acnecessary, therefore, to run the machine 55 cordance with my invention. Fig. 8 is a intermittently with the concentrated gas,

'journaled which upon rotation actuates a Wheel 15,

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thereby greatly reduci ng the efliciency of the machine, and the output thereof. Further, it was found that the lime tended to accumulate within the cylinders or tubes, and, the

agitators being driven by meshed gear wheels, the agitators or the shaft on which they were mounted, or the gear wheels themselves would frequently break, putting the machine out of commission. Further, at the point of communication between tubes of each pair, the lime or products has a great tendency to accumulate, with the consequence that the gas, going in the opposite direction, fails to properly act upon the same, thereby greatly affecting the quality of the product.

To overcome these and many other disadrantages of this type of machine, my present application is especially directed.

In carrying out my invention I employ the usual tubes or powder chambers 1, each communicating with the one immediately above and immediately below it through the passages 2, all of the tubes or chambers being suitably supported in a frame 3, and arranged one above the other, as shown. In the form shown, I employ six such tubes, each of which being supplied with the usual agitator shaft 4, upon which are mounted the vanes or blades 5, which, upon the rotation of the shaft affords the agitation of the lime which is fed into the topmost tube through a suitable ho'pper 6, and which drops from the bottom tube into any suitable receptacle 7. The chlorin gas is fed into the bottom cylinders through a port 8, or it may be fed into any number of cylinders, as shown, through such a port, and is forced or sucked through the tubes and out through a suitable exhaust 9. Each of the shafts 4 is provided with a sprocket wheel 10, and two of said shafts,,, preferably the second from the top and the bottom one, have secured thereto a second sprocket wheel 11, as shown. A suitable chain 12 operates between sprocket wheels of the top and third from the top t bes, and ov'er the sprocket wheel of the second from the top tube.

ikewise, a similar chain 13 operates between the sprocket wheels of the bottom and third from the bottom tubes, and over the sprocket wheel of the second from the bottom tube, all as clearly shown. Suitably in the frame 3, is a worm shaft 14,

which is carried by a shaft 16, also suitably journaled in the frame 4. Mounted on the shaft 16, to rotate therewith are two sprocket wheels 17 which are suitably connected, ,such as by chains 18, with the respective wheels 11. Thus it will be seen that when the shaft 14 is rotated, the agitator shaft of each individual tube will in turn be rotated. The worm shaft 14 may be rotated in any suitable manner, and from any suitable source, such for instance, as by a belting over the pulley 19. From the arrangement thus described it will be seen that if the lime cakes within the chambers, and the strain reaches the breaking point upon any of the parts, the chains 12, 13, or 18 being the weakest portion of the machine, will break, thereby shutting down the machine before any internal parts are broken and serious in ury done. These chains are comparatively cheap, easily mended, and can be quickly mended or replaced, and greatly lessens the expense of upkeep, and increases the efhciency of the machine. The chains referred to may be suitably adjusted, or replaced by the movement of the pulleys or idlers 38, as will be readily understood.

To enable the constant use of concentrated chlorin gas, it is desirable to employ suitable cooling means for the respective tubes.

have shown one simple arrangement wherein I supply suitable water jackets 20 for the tubes, each communicating through a passage 21, at opposite ends, to the tube immediately above and below the same.

ater, or other suitable cooling medium is fed into the topmost tube, and is allowed to flow by gravity to the bottom tube, and out therefrom, as will be clearly understood.

To enable an operator to keep close watch of the progress of the lime through the ma- 7 chine, suitable removable doors or windows 22 may be provided throughout the length of the tubes, as shown in Figs. 10 and 12.

In the standard form of Hasenclever machine, great difliculty has been encountered in securing proper feeding of,the lime into the machine due to the fact that heretofore it has been the custom to feed the lime directly into the first or top tube. Wher the lime comes in bulk, it has a great tend ncy to accumulate due to the moisture of the atmosphere, or other reasons thereby forming a hard mass. This, of course, subjected the agitator shaft and the agitators of the top most tube to considerable strain, and to the possibilit of breakage. Further, to prevent cho 'ng the machine from an exorbitant feed, it was necessary to provide-a hopper with a very restricted opening into the machine, and when lumps or cakes of the lime covered such opening, the feed stopped, thereby necessitating an attendant to agitate the lime in the hopper, and to break u such lumps or cakes. To obviate this di culty, I provide an auxiliary cylinder or tube 23, opening at one end into the top tube or powder chamber 1, and through which extends a screw shaft 24 provided with screw threads 25, as shown in Figs. 6 and 9. The shaft 24 has secured thereto a gear or sprocket wheel 26 which may be rotated in any suitable or desirable manner. I prefer to operate the same b means of a chain or other connection 2 with a similar sprocket 28 mounted on the same agitator shaft 4 as is the wheel 11, hereinbefore described. (See Fig. 1). The hopper 16 opens into the auxiliary feed cylinder 23, and it will be noted that by this arrangement, the screw shaft automatically breaks up the cakes or lumps of lime, insures .a steady and equal feed, and automatically stops the feed when the rest of the machine is inoperative.

As hereinbefore explained, it is desirable to agitate the lime within the hopper. I have shown one arrangement for accomplishing this wherein I provide the hopper 16 with a loosely fitting funnel 29, see Fig. 9, which funnel is provided with a thick or reinforced portion 30 on opposite sides thereof. Suspended from the mouth of the hop per 16 on opposite sides thereof, are two arms or pendulums 31, provided with a heavy hammer 32 secured near the free end thereof. Passing through the wall of the hopper 16, to come in contact with the reinforced portions 30 of the loose fitting funnel 29, are pins 33. It will be seen that when the pendulums 31 are swung, the hammers 32 will come in contact with the pins 33, causing the same to shake or jar the funnel. Any suitable means may be employed to actuate the pendulums 31. I have shown one arrangement wherein I mount shafts 34 in suitable brackets 35 carried by the cylinder casting 23, and driven by suitable gear or friction connection 36, by the screw shaft 24. Mounted on the shafts 34 to rotate therewith are arms 37, which on rotation of the shaft, comein contact with, and swing out ward from the hopper, the free ends of the pendulums 31.

As has been hereinbefore explained, it is desirable to provide means for preventing the lime accumulating in the tube at the oint immediately below the opening therein from the tube above it. For this purpose I provide a suitable scraper 39 mounted on the agitator shaft 4 of each tube, to be rotated thereby and ositioned closely adjacent to the closed en' 5 of the tube.

It has heretofore been the practice to col lect the product in a receptacle positioned under the discharge orifice of the bottom tube, and then carry away this product to be sifted to secure the commercial form of bleaching powder. I'propose to eliminate this extra operation by providing the discharge orifice with a sifting screen so that the commercial product is secured directly from the machine.

InFig. 5 I have shown one arrangement wherein the tube 1 is open at its end and discharges directly into a screen 40. The fine commercial form of the product is thereby obtaineddirectly from beneath the screen, while the large lumps of the same are dis charged from out of the mouth of the same, due to its slanted position as s" in which it leaves the machine.

In Figs. 3 and 4, I ha e shown a modified arrangement wherein I mount the screen 41 on the shaft 3 of the tube, to be rotated thereby, and the product, being thus sifted through the screen, is collected at the discharge orifice 42 in its fine commercial form, as will be readily understood.

It has heretofore been the practice, by any suitable means, to cause the gas to travel through the machine by suction, and to discharge the gas into atmosphere in the state In the course of its travel through the various tubes, the gas picks up fine particles of the lime, and at the point of discharge of the gas, this fine powder is likewise discharged, causing great waste, and making it unhealthy and disagreeable to work about the machine at that point. For this and other reasons I provide the discharge pipe 9 with a rectangular portion, as shown in Figs. 7 and 8, and I provide a number of screens 50 in said pipe, adapted to be readily removed to be cleaned or replaced through an opening in said pipe, which opening is provided with a cover 51. The exhaust pipe may be provided with a port or wi ndow 53 to allow the same to be cleaned when necessary. Thus it will be seen that the exhaust gas will be thoroughly filtered before being discharged into the atmosphere, thereby saving a waste of the lime and at the same time eliminating the disagreeable result of the fine powder flying around through the air.

While I have shown and described in detail specific arrangements embodying my invention, it will be understood that my broad invention, as defined in the claims, is not to be limited or restricted thereto, as many modifications will readily occur to those skilled in the art without departing from the spirit or scope of my invention.

Therefore, what I claim as new and useful and of ,my own invention and desire to secure by Letters Patent, is,

1. In a bleaching powder machine, a plu rality of tubes arranged the one above tf other, and communicating with each 0th at opposite ends, means for admitting; into the bottom tubes, means for admitti lime in the top tube, means for causing s2 lime to travel the length of each of s2 tubes, in succession in opposition to the rection of travel of said gas, and means 1 cated on the bottom tube for sifting sa' lime at the end of its travel in said tubes 2. In a bleaching powder machine, a 1 rality of tubes arranged in sets of three, agitator shaft for each of said tubes, :1 chains actuated from a common source 1 rotating said agitator shafts of each set.

3. In a bleaching powder machine, t combination of a shaft, agitators arrang. therein to rotate therewith, and a siftir screen mounted on said shaft.

4. In a bleaching powder machine, the combination of a powder tube, closed at its ends, a shaft located in said tube and passing through the ends thereof, agitators mounted on said shaft, scrapers also mounted on said shaft and positioned immediately adjacent the ends of said tube and'within the same, and means forrotating said shaft.

5. In a bleaching powder machine, a plurality of tubes arranged the one above the other and communicating with each other at opposite ends, means for admitting lime in the top tube, means for causing said lime to travel the length of each of said tubes, means for admitting gas into the bottom tubes, means to 'cause said gas to travel in a direction opposite to the travel of said lime, means for sifting the lime at the end of its travel in said tubes, and means for filtering said gas at the end of its travel in said tubes.

6. In a bleaching powder machine, a plurality of tubes arranged the one above the other and communicating with each other at opposite ends, means for admitting lime in the top tube, means for causing said lime to travel the length of each "of said tubes,

means for admitting gas into the bottom.

tubes, means to cause said gas totravel in a direction opposite to the travel of said limo, means for sifting the lime at the ends of its travel in said tubes, and a removable filtering screen for filtering said gas at the end of its travel in said tubes.

In testimony whereof I have hereunto set my hand on this 31st day of Deceniber ICHIRO ISHIKAWA. 

